/* Reads a 128 kB file onto the stack and "sorts" the bytes in
   it, using quick sort, a multi-pass divide and conquer
   algorithm.  The sorted data is written back to the same file
   in-place. */

#include <debug.h>
#include <syscall.h>
#include "tests/lib.h"
#include "tests/main.h"
#include "tests/vm/qsort.h"

int main(int argc UNUSED, char *argv[])
{
    int handle;
    unsigned char buf[128 * 1024];
    size_t size;

    test_name = "child-qsort";
    quiet = true;

    CHECK((handle = open(argv[1])) > 1, "open \"%s\"", argv[1]);

    size = read(handle, buf, sizeof buf);
    qsort_bytes(buf, sizeof buf);
    seek(handle, 0);
    write(handle, buf, size);
    close(handle);

    return 72;
}
